Update actions/checkout action to v4

.github/workflows/auto-readme.yml

@@ -24,7 +24,7 @@ jobs:
   update:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Find default branch name
         id: defaultBranch

.github/workflows/test-fixed-default.yml

@@ -20,7 +20,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/test-fixed-long.yml

@@ -20,7 +20,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/test-long-default.yml

@@ -20,7 +20,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/test-long-fixed.yml

@@ -20,7 +20,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/test-long-short.yml

@@ -20,7 +20,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current

.github/workflows/test-short-long.yml

@@ -20,7 +20,7 @@ jobs:
     needs: [setup]
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - uses: ./
         id: current